The Spain international has netted 12 Premier League goals under Antonio Conte this campaign – already surpassing his tally of 11 last year.
Costa was on target yesterday as his late winner sunk West Brom at Stamford Bridge to maintain their three-point lead at the summit of the table.
“This season he is the centre forward who never rests”
Jamie Redknapp on Chelsea star Diego Costa
Chelsea have now won nine league games on the spin, conceding just two goals in that stretch.
And former Liverpool star-turned-pundit Jamie Redknapp has hailed the Blues’ star striker, claiming Costa has transformed himself into a role model.
“Last season Diego Costa was intent on making a nuisance of himself at Chelsea but under Antonio Conte he is becoming a fine example for young players,” Redknapp wrote in his Daily Mail column.
“This season he is the centre forward who never rests.
“His work-rate is so high – just look at how he outmuscled Gareth McAuley and stole in to give Chelsea another three points against West Bromwich.”